Abstract
This article investigates the influence of power converters and linear induction motor (LIM) without energy storage system on an axial-flux permanent magnet synchronous generator (PMSG) based on electromagnetic field characteristic analysis. First, the axial-flux PMSG and the LIM are introduced with characteristic analysis results, and their verification is addressed by a finite element method (FEM) and experiment. The axial-flux PMSG is double-side rotor type with slotless structure for cogging torque reduction, and rare-Earth permanent magnets are employed for high power density. On the other hand, since the LIM has an overhang structure in the secondary plate, the transverse edge effect is considered in the analysis to determine the overhang length of the secondary structure, and the optimized length is verified by the results of thrust force and equivalent circuit parameters. In this study, manufactured machines are connected with power converters, and relevant experiments are performed to measure the current according to various operating conditions of LIM as a load. By analyzing the power losses, the influence of the LIM operation on the axial-flux PMSG is discussed in this study.
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